Localization for Self-Reliance! Chenzhu Empowers the Intelligent and Standardized Upgrade of Coal Chemical Industry
Chenzhu Wind Power Energy Foreword: The intelligent upgrade of the coal chemical industry faces three major challenges: adaptation to harsh working conditions, implementation of new standards, and intelligent operation and maintenance. With nearly 30 years of accumulation in intrinsic safety technology, Shanghai Chenzhu has launched the latest SPE/APL explosion-proof solution, which brings greater possibilities for future AI predictive maintenance and helps significantly reduce unplanned downtime.
From May 8 to 10, 2026, the 3rd Technical Conference on Instrument Selection, Design, Installation and Operation of Coal Chemical Industry & the 2nd Technical Conference on Safety Monitoring Compliance of Hazardous Chemicals Enterprises was held in Yulin, Shaanxi.
Hosted jointly by the Process Industry Branch of China Mechanical and Electrical Integration Technology Application Association and the National Expert Group on Chemical Instrumentation and Control, this conference focused on empowering new quality productive forces with instrumentation and control technology. It deeply discussed the evolution of technical standards, the application of instruments in harsh working conditions and engineering implementation practices around the development direction of intelligence, greening and compliance of the coal chemical industry. Shanghai Chenzhu participated in the conference with core PA products such as safety barriers and SPE/APL explosion-proof solutions. With independently controllable domestic instrument technology, it helps the upgrading of the coal chemical industry and builds a solid safety foundation.
Not Only "Visible", but Also "Reliable"
At this conference, **predictive maintenance** and **standard implementation** became two core keywords for the upgrading of the coal chemical industry:
1. Predictive Maintenance
Zhao Junsong (Senior Expert of the Ministry of Emergency Management of China)
In his report *Hierarchical Control and Predictive Maintenance of Instrument Equipment*, Zhao Junsong pointed out that in accordance with the latest national standards *GB/T 44692.1-2024 Equipment Integrity of Hazardous Chemicals Enterprises
- Part 1: Requirements for Management Systems* and *GB 45673-2025 General Specification for Work Safety Standardization of Hazardous Chemicals Enterprises*, hazardous chemicals enterprises are encouraged to adopt digital and intelligent technologies for equipment integrity management. The standards require establishing and maintaining management procedures for equipment inspection, testing and preventive maintenance. One of the key foundations for predictive maintenance is massive, high-quality data covering the full life cycle of instrument equipment. This undoubtedly raises new requirements for field instruments in data collection capability, transmission bandwidth and openness, far exceeding those of the traditional 4-20mA mode.
2. Standard Implementation
Ye Xiangdong (Deputy Chief Engineer of Sinopec Engineering Incorporation, Main Drafter of the Standard)
Ye Xiangdong delivered an in-depth interpretation of *SH/T 3081-2025 Code for Design of Instrument Grounding in Petrochemical Industry*, which will take effect on July 1, 2026 and replace SH/T 3081-2019.
*GB/T 3081-2025 Code for Design of Lightning Protection and Static Electricity Grounding of Instrument Systems in Petrochemical Industry* 4.3 Grounding of Intrinsic Safety Systems
4.3.1 Intrinsic safety systems adopting isolated safety barriers shall not be grounded.
4.3.2 Intrinsic safety systems adopting Zener safety barriers shall be connected to the common terminal of the DC power supply via a busbar. 4.6 Lightning Protection Grounding
4.6.2 Surge protectors installed in the control room shall adopt metal rail mounting type, and the mounting rail shall serve as the grounding busbar.
4.6.4 The grounding conductor of the surge protector assembled on field instruments shall be connected to the internal grounding terminal of the instrument.
Respond to Changing Needs with Definite Products Faced with the urgent demand for **in-depth data** and scientific thinking derived from the practice of **safety specifications**, Chenzhu relies on nearly 30 years of engineering experience in the safety field to provide forward-looking safety products and solutions for the process industry.
Safety Barrier: The Cornerstone of Intrinsic Safety and the Starting Point of Compliance - Verified by nearly 30 years of industrial application, providing a full range of isolated and Zener safety barriers, with guaranteed delivery supported by a domestic supply chain. - TÜV functional safety certified, with safety integrity level up to SIL3.
HART Multiplexer: "Intelligent Data Gateway" Connecting Existing Instrument Networks - Supports HART 5-7 full protocol versions and RS485 dual redundant output, compatible with safety barrier signal filtering. - Patented 16384-node cascading topology (master + slave expansion) to meet the access needs of ultra-large factory equipment.
Surge Protective Device (SPD): "Lightning Protection Guard" of the System Chenzhu provides complete surge protection solutions for both control room and field instrument sides: - **Control room side**: C Pro series intelligent SPD, equipped with fault indication for easy operation and maintenance; safety integrity level up to SIL3. - **Field side**: - CZLBX series field SPD: Applicable to explosive gas environments (intrinsic safety ia, flameproof db) and explosive dust environments (intrinsic safety ia, dust ignition-proof enclosure tb). - Explosion-proof tee: Applicable to explosive gas environments (flameproof db) and explosive dust environments (dust ignition-proof enclosure tb).
Safety Relay: "High-Reliability Executor" of SIS System - Chenzhu Process series safety relays are among the first domestic products to obtain TÜV functional safety certification, equipped with critical safety functions such as Emergency Shutdown (ESD).
SPE/APL Explosion-proof Solution: Breaking Through the "Last Mile" of Data in Explosion-proof Zones - To meet the high-speed data demand of predictive maintenance, Chenzhu's SPE/APL explosion-proof solution is undergoing functional verification. It realizes real-time upload of massive status and diagnostic data of instruments in explosion-proof zones via 10Mbps high-speed transmission, enabling predictive maintenance. - 2-WISE intrinsic safety architecture and full-port isolation design ensure the absolute safety of this "data highway" in flammable and explosive environments, realizing intelligent transformation on the premise of safety.
From "Product Compliance" to "Value Symbiosis"
We deeply participate in standard evolution: Chenzhu is not only a practitioner of specifications, but also a participant in formulating national/industrial standards (e.g., GB/Z 3836.37-2025), and can provide optimized suggestions based on in-depth standard understanding. - We provide time-tested reliability: With nearly 30 years of deep cultivation in industrial safety, our products have passed numerous harsh project tests, achieving outstanding performance in functional safety, explosion-proof rating and domestic substitution.
We focus on the future of safety and connectivity: From securing traditional signal loops to supporting Ethernet-APL (Ethernet Advanced Physical Layer) in reshaping the digital future of the process industry, Chenzhu empowers industrial intelligent and digital transformation with a "safety foundation". Standards and practices keep dialoguing; Technology iterates rapidly. The choice of the coal chemical industry, at a deeper level, is the pursuit of **certainty**.
Standards and practices keep dialoguing;
Technology iterates rapidly.
The choice of the coal chemical industry,
At a deeper level,
Is the pursuit of certainty.
